Final Exam

Which of these is not a basic physical issue that can occur on a network when a user is connected via cable?

DNS configuration

Which of these represents the bi-directional traffic flow across an Ethernet interface?

Full-duplex

You install new switches in your server room and are now experiencing network instability and other issues across all servers in the rack. Which device would be used to alert you of system overheating?

voltage event recorder

Which of these is not a chain type used by iptables?

Backward

Which command-line tool would best be used to verify DNS functionality in Linux?

dig

Which new Linux command was added recently to configure IP and interface parameters?

ip

Which ftp navigation tool displays and changes the current directory on the local machine?

lcd

Which of the following statements is true about a wire-map tester?

It is a device that transmits signals through each wire in a copper twisted-pair cable to determine if it's connected to the correct pin at the other end.

Which of the following statements is true about a butt set?

It is essentially a portable telephone that allows the users to test analog wet or dry lines and is used to monitor those lines.

Which device would be used to measure voltage?

Multimeter

Which of these is used to describe network traffic flow that either enters or leaves the data center from/to a system physically residing outside the data center?

North-South

Which of these can check the speed and condition of the signal on a cable, measure the time it takes to send a signal down the wire and back, and find the exact location of a break?

TDR

While unexpected adverse effects of a change can't always be anticipated, a good-faith effort should be made to identify all possible systems that could be impacted by the change.

True

Which pins are switched in a crossover cable?

1 and 3, 2 and 6

Which SNMP version added support for the GET BULK operations?

SNMPv2c

Which of the following arp utility switches display the current ARP entries by interrogating the current protocol data? Each correct answer represents a complete solution. Choose all that apply.

-a -g

Which netstat utility displays all connections and listening ports on the host computer?

-a

Which switch displays both workstation and server sessions but lists remote addresses by IP address only?

-S

Which netstat command displays addresses and port numbers in numerical form?

-n

Which netstat command displays the owning process ID associated with each connection?

-o

On which of these would a technician use a punch-down tool?

110 blocks

Which of these is a process-related standard that outlines best practices for IT asset management in an organization?

19770-1

What can be the smallest size of an Ethernet frame?

64 bytes

A user can't log in to the network. She can't even connect to the Internet over the local area network. Other users in the same area aren't experiencing any problems. You attempt to log in as this user from your workstation with her username and password and don't experience any problems. However, you cannot log in with either her username or yours from her workstation. Which of these is the likely cause of the problem mentioned in the given scenario?

A bad patch cable

Which of these allows for applications to control and configure the network without human intervention?

API

At which layer do the servers connect on a three-tiered network?

Access

After a network configuration change has been made, which of these is not a document that needs to be updated?

Application document

Which of these can refer to the standard level of performance of a certain device or to the normal operating capacity for the whole network?

Baseline

Which of these mathematically determines network errors?

CRC

Which device should be used if you need to determine whether your network meets ISO or TIA standards?

Certifiers

Several users can't log in to the server. Which action would help you to narrow the problem down to the workstations, network, or server?

Check the server console for user connections.

You have a user who cannot connect to the network. What is the first thing you could check to determine the source of the problem?

Connectivity

Where does the SDN controller interface reside in the control plane with the switching fabric?

Control plane

Which tool is used to attach an RJ-45 connector to Cat 5e, 6, 7, or 8 cables?

Crimper

Which of these is a text string containing detailed information about the event being reported?

Description

Which of these methods are used to connect a private cloud to a public cloud?Each correct answer represents a complete solution. Choose all that apply.

Direct Connect Internet VPN

Which of these is not a function of a TDR?

Display unused services.

You have implemented and tested a solution and identified any other effects that the solution may have. What is your next step?

Document the solution.

Which of these are the metrics that are tracked to account for utilization in operations? Each correct answer represents a complete solution. Choose all that apply

Downtime Uptime

When troubleshooting an obscure network problem, what physical conditions should be reviewed to make sure that the network device is operating correctly? Each correct answer represents a complete solution. Choose all that apply.

ESD problems Excessive humidity Excessive heat

Which of the following Syslog severity level denotes that the system is unusable?

Emergency

Which of these occurs when a segment of data fails the addition or deletion of header information?

Encapsulation error

You are troubleshooting a LAN switch and have identified the symptoms. What is the next step you should take?

Escalate the issue.

Which of these is a system-design protocol that guarantees a certain amount of operational uptime during a given period?

High availability

You receive a call from a user who is having issues connecting to a new VPN. Which is the first step that you should take?

Identify the symptoms and potential causes.

Abstracting the cloud hardware into software objects for automated configuration is referred to as ___________________.

Infrastructure as Code

When the vendor provides the hardware platform or data center, and the company installs and manages its own operating systems and application systems, which service type is being used?

Infrastructure as a Service

What is the variation in delay called?

Jitter

When wireless users complain that they are losing their connection to the applications during a session, what is the source of the problem?

Latency

Which of the following tools can test a port on a device?

Loopback plug

You lose power to your computer room, and the switches in your network do not come back up when everything is brought online. After you have identified the affected areas, established the cause, and escalated this problem, what should be your next step?

Meet with the emergency response team to determine the next step.

Which device components should not be allowed to reach full capacity? Each correct answer represents a complete solution. Choose all that apply.

Memory CPU

Which of the following statements is true about latency?

More the latency, longer the delay, and longer the users have to stare blankly back at their computer screen, hoping something happens soon.

Which of these can collect more granular information on traffic flows than SNMP is able to?

NetFlow

Which tool would the users use to both find a break in a fiber-optic connection and test the fiber connectivity on the network?

OTDR

Several users have complained about the server's poor performance. However, you know that the memory installed on the server is sufficient. What could you use to determine the source of the problem?

Performance-monitoring tools

You have upgraded the firmware on your switches and access points. Which documentation do you need to update?

Physical network diagram

Which ping commands will verify that the local TCP/IP interface is working? Each correct answer represents a complete solution. Choose all that apply.

Ping 127.0.0.1 ping localhost

Which of these governs how a network is configured and operated as well as how people are expected to behave on a network?

Policies

Wireshark is an example of a(n) __________.

Protocol analyzer

Which of these steps are not part of the Network troubleshooting model? Each correct answer represents a complete solution. Choose all that apply.

Reboot the servers. Reboot all the routers.

Which Windows utility can the users use to connect to a machine 50 miles away to troubleshoot?

Remote Desktop

Which of these supports strong authentication with MD5 or SHA, providing confidentiality and data integrity of messages via DES or DES-256 encryption between agents and managers?

SNMPv3

Which networking protocol uses OIDs and MIBs for data collection and organization of data?

SNMP

Which of the following versions of SNMP supports plaintext authentication with community strings and uses only UDP?

SNMPv1

A workstation presents an error message to a user. The message states that a duplicate IP address has been detected on the network. After establishing a change in the network, what should be the next step of the standard troubleshooting model?

Select the most probable cause.

You need to create a cable that will connect your host to a wall jack connection. Which of the following tools will you use?

Snips

Which device monitors incoming voltage levels and overvoltage thresholds?

Surge protector

Which of these is included in the rack security?

Swing handle with a number and key lock

Which protocol allows the users to display, sort, and even search messages, all of which makes it a great troubleshooting tool?

Syslog

Which environmental variables are critical factors in the health of computing equipment? Each correct answer represents a complete solution. Choose all that apply.

Temperature Humidity

You have just implemented a solution to the problem and, now, you want to celebrate your success. Before doing so, what should you do?

Test the solution and identify other effects it may have.

A user is experiencing problems logging in to a Linux server. He can connect to the Internet over the local area network. Other users in the same area aren't experiencing any problems. You attempt logging in as this user from your workstation with his username and password and don't experience any problems. However, you cannot log in with either his username or yours from his workstation. What is the likely cause of the situation explained in the given scenario?

The Caps Lock key is pressed.

Users are reporting that they can access the Internet but not the internal company website. Which of these is the most likely problem?

The intranet server is down.

A user calls you to report a problem regarding logging in to the corporate intranet. You can access the website without problems using the user's username and password. At your request, the user has tried logging in from other workstations but has been unsuccessful. What is the most likely cause of the problem?

The user is logging in incorrectly.

A user calls you complaining that he can't access the corporate intranet web server. You try the same address, and you receive a 'Host Not Found' error. Several minutes later, another user reports the same problem. You can still send emails and transfer files to another server. What is the most likely cause of the problem mentioned in the given scenario?

The webserver is down.

You are able to ping the local router and web server that a local user is trying to reach, but you cannot reach the web page that resides on that server. From step 2 (establish a theory of the probable cause) of the troubleshooting model, what is a possible problem that would lead to this situation?

There is a problem with your browser.

What is the purpose of wire-map testers?

To detect transposed wires, opens, and shorts in twisted-pair cables

Which device will be used to locate a specific connection in an unlabeled punch-down block?

Toner probe

Which tool will the users use to trace cables in multiple-pair wiring?

Toner probe

A specific server's baseline describes norms for factors, such as how busy its processors are and how much of the memory it uses.

True

Which virtualization approach runs within a conventional operating system environment?

Type 2 hypervisor

Which of these are the reasons to optimize network performance? Each correct answer represents a complete solution. Choose all that apply.

Using VoIP Using video applications Minimizing latency

Which of the following components of virtual networking can perform all the same functions as physical servers?

Virtual server

Which of these describes numerous technologies that are able to deliver voice communications over the Internet or other data networks?

VoIP

UTP cable has specific colors for the wire associated with each pin. Based on the TIA/EIA 568B wiring standard, what is the correct color order, starting with pin 1?

White/orange, orange, white/green, blue, white/blue, green, white/brown, brown

You have gathered information on a network issue and determined the affected areas of the network. What should be your next step to resolve this issue?

You should check if there have been any recent changes to this affected part of the network.

Which TCP/IP utility will produce the following result? Interface: 199.102.30.152 Internet Address Physical Address Type 199.102.30.15 A0-ee-00-5b-0e-ac dynamic

arp

Which command-line tool can the users use to find the NIC's specific MAC address and IP address without physically going to the computer?

arp

End-to-end loss across an Ethernet cable is called _______.

attenuation

Which utility can the users use to find the MAC and TCP/IP addresses of the Windows workstation?

ipconfig /all

Public clouds are divided into logical groupings that allow many different customers to access a section as if it were their own private data center. This process is known as ___________________.

multitenancy

Which software tool looks at all traffic on a network segment?

packet sniffer

Which TCP/IP utility is most often used to test whether an IP host is up and functional?

ping

Which TCP/IP utility will produce the given output? Reply from 204.153.163.2: bytes=32 time=1ms TTL=128 Reply from 204.153.163.2: bytes=32 time=1ms TTL=128 Reply from 204.153.163.2: bytes=32 time=1ms TTL=128 Reply from 204.153.163.2: bytes=32 time<10ms TTL=128

ping

Which tool pushes a conductor between the sides of a V inside an IDC?

punch-down tool

Which of these is a wiring error where two connections that are supposed to be connected using the two wires of a twisted-pair cable are instead connected using two wires from different pairs?

split pair

Which command captures the traffic on all interfaces?

tcpdump -i any

Which utility produces output similar to the given output? 110 ms 96 ms 107 ms fgo1.corpcomm.net [209.74.93.10] 96 ms 126 ms 95 ms someone.corpcomm.net [209.74.93.1] 113 ms 119 ms 112 ms Serial5-1-1.GW2.MSP1.alter.net [157.130.100.185] 133 ms 123 ms 126 ms 152.ATM3-0.XR2.CHI6.ALTER.NET [146.188.209.126] 176 ms 133 ms 129 ms 290.ATM2-0.TR2.CHI4.ALTER.NET [146.188.209.10] 196 ms 184 ms 218 ms 106.ATM7-0.TR2.SCL1.ALTER.NET [146.188.136.162] 182 ms 187 ms 187 ms 298.ATM7-0.XR2.SJC1.ALTER.NET [146.188.146.61] 204 ms 176 ms 186 ms 192.ATM3-0-0.SAN-JOSE9- GW.ALTER.NET [146.188.144.133] 202 ms 198 ms 212 ms atm3-0-622M.cr1.sjc.globalcenter.net [206.57.16.17] 209 ms 202 ms 195 ms pos3-1-155M.br4.SJC.globalcenter.net [206.132.150.98] 190 ms * 191 ms pos0-0-0-155M.hr3.SNV.globalcenter.net [206.251.5.93] 195 ms 188 ms 188 ms pos4-1-0- 155M.hr2.SNV.globalcenter.net [206.132.150.206] 198 ms 202 ms 197 ms www10.yahoo.com [204.71.200.75]

tracert

You are a network administrator in a reputed company. A user calls you complaining that the performance of the intranet web server is sluggish. When you try to ping the server, it takes several seconds for the server to respond. You suspect that the problem is related to a router that is seriously overloaded. Which of the following workstation utilities could you use to find out which router is causing this problem?

tracert